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Fermi velocity renormalization in doped graphene
Author(s) -
Attaccalite C.,
Rubio A.
Publication year - 2009
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.200982335
Subject(s) - condensed matter physics , renormalization , graphene , physics , doping , fermi level , fermi energy , ab initio , fermi gamma ray space telescope , renormalization group , local density approximation , quantum mechanics , electronic structure , electron
We present an ab initio study of the graphene quasi‐particle band structure within GW approximation. In particular we studied the renormalization of the Fermi velocity v F as function of the electrostatic doping. We show that within local density approximation (LDA) the Fermi velocity is substantially renormalized by correlation effects and that this renormalization rapidly decreases with doping. We discuss our results in the light of recent experiments on graphene and intercalate graphite.